Intron - Meaning, Definition & English Examples
An intron is a non-coding segment of DNA or RNA that is removed during gene expression. It does not code for proteins but plays a role in genetic regulation.
Definition:
A non-coding segment of DNA removed during RNA splicing.
Synonyms:
intervening sequence, non-coding region, spacer DNA
Part of Speech:
noun
Antonyms:
exon, coding sequence
Common Collocations:
intron removal, intron splicing, intron retention, intron-exon boundary
Derivatives:
intronic, intronless
Usage Tips:
Use "intron" when discussing genetics to refer to non-coding DNA segments excised during transcription.
Common Phrases:
intron splicing mechanism, intron retention event, intron-exon junction
Etymology:
Derived from "intragenic region," combining "intra-" (within) and "-on" (unit).
Examples:
- 1. The intron is spliced out during mRNA processing.
- 2. Scientists study introns to understand genetic regulation better.
- 3. This gene contains three exons and two introns.
- 4. Introns were once considered "junk DNA."